"He came to Dianna's 3pm Glee performance at the Staples Center in Los Angeles on May 28," a source told Life and Style.

"He waited for her backstage. Once the cast finished the show, Dianna ran backstage to Sebastian, and they were all over each other! Dianna and Sebastian love hanging out together. He can definitely hang with the Glee cast."

An insider said at the time: "Chris's brother Scott is a huge fan of her show, and he particularly loves Dianna. He and his friends like to joke that as long as she stays on the show, the family will welcome her with open arms!"